CIDER, which the author of this blogpost maintains, has support for such metadata, under the style/indent key. The hope, when it was created, was that more editors would adopt this, but after years it's not caught on.

I use it extensively and it's both easy to use and super flexible (for the rare cases when you do need that).

Here's a link to the indent spec, if you want to read more: https://docs.cider.mx/cider/indent_spec.html